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I migrated an asp.net app to 4.0. Now I am getting an error "The type or namespace name 'IQueryable' could not be found". The reference to System.Linq is invalid and I can't find it in the reference list. Where did System.Linq go?
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The System. Linq namespace is in the System. Core assembly (in System. Core.
Language-Integrated Query (LINQ) is the name for a set of technologies based on the integration of query capabilities directly into the C# language. Traditionally, queries against data are expressed as simple strings without type checking at compile time or IntelliSense support.
NET Core LINQ stands for Language Integrated Query. Language Integrated Query is one structured query that is used to retrieve data from the database and other different sources and formats. LINQ tutorials will assist you to find out the LINQ language using topics that go from basic to advanced.
Linq is generic-level implementation which relies on IEnumerable whereas System. Data. Linq is provider-specific (LINQ to SQL) which relies on IQueryable.
Make sure you are referencing System.Core.dll in your project. The IQueryable<T> type is defined in that assembly (just as it was in .NET 3.5).
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